Describe the feeling first
You do not need perfect genre labels at the beginning. Start with simple feelings like calm, bright, costume-focused, close to fans, elegant, or casual.
Then compare those feelings against idol-style, cosplay, streamer, gravure, or soft casual profiles.
Compare two different styles
It is easier to learn your taste by comparing two different styles than by browsing one category forever.
Try soft casual versus streamer, cosplay versus idol-style, or gravure versus daily-life updates.
Choose what you want to revisit
The best genre for you is the one you naturally want to open again later.
Save a few candidates and check which one still feels memorable after a little time.